189135697 has 2 divisors, whose sum is σ = 189135698. Its totient is φ = 189135696.

The previous prime is 189135689. The next prime is 189135733. The reversal of 189135697 is 796531981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143424576 + 45711121 = 11976^2 + 6761^2 .

It is a cyclic number.

It is not a de Polignac number, because 189135697 - 2³ = 189135689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189135697.

It is not a weakly prime, because it can be changed into another prime (189135607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94567848 + 94567849.

It is an arithmetic number, because the mean of its divisors is an integer number (94567849).

Almost surely, 2^189135697 is an apocalyptic number.

It is an amenable number.

189135697 is a deficient number, since it is larger than the sum of its proper divisors (1).

189135697 is an equidigital number, since it uses as much as digits as its factorization.

189135697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The square root of 189135697 is about 13752.6614515155. The cubic root of 189135697 is about 574.0166653734.

The spelling of 189135697 in words is "one hundred eighty-nine million, one hundred thirty-five thousand, six hundred ninety-seven".